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Python Source  |  1997-01-17  |  3.0 KB  |  149 lines
  1. #! /ufs/guido/bin/sgi/python
  2.  
  3. # Copy a video file, interactively, frame-by-frame.
  4.  
  5. import sys
  6. import getopt
  7. from gl import *
  8. from DEVICE import *
  9. import VFile
  10. import VGrabber
  11. import string
  12. import imageop
  13.  
  14. def report(time, iframe):
  15.     print 'Frame', iframe, ': t =', time
  16.  
  17. def usage():
  18.     sys.stderr.write('usage: Vcopy [-t type] [-m treshold] [-a] infile outfile\n')
  19.     sys.stderr.write('-t Convert to other type\n')
  20.     sys.stderr.write('-a Automatic\n')
  21.     sys.stderr.write('-m Convert grey to mono with treshold\n')
  22.     sys.stderr.write('-d Convert grey to mono with dithering\n')
  23.     sys.exit(2)
  24.  
  25. def help():
  26.     print 'Command summary:'
  27.     print 'n   get next image from input'
  28.     print 'w   write current image to output'
  29.  
  30. class GrabbingVoutFile(VFile.VoutFile, VGrabber.VGrabber):
  31.     pass
  32.  
  33. def main():
  34.     foreground()
  35.     try:
  36.         opts, args = getopt.getopt(sys.argv[1:], 't:am:d')
  37.     except getopt.error, msg:
  38.         print msg
  39.         usage()
  40.     if len(args) <> 2:
  41.         usage()
  42.     [ifile, ofile] = args
  43.     print 'open film ', ifile
  44.     ifilm = VFile.VinFile(ifile)
  45.     print 'open output ', ofile
  46.     ofilm = GrabbingVoutFile(ofile)
  47.     
  48.     ofilm.setinfo(ifilm.getinfo())
  49.  
  50.     use_grabber = 0
  51.     continuous = 0
  52.     tomono = 0
  53.     tomonodither = 0
  54.     for o, a in opts:
  55.         if o == '-t':
  56.             ofilm.format = a
  57.             use_grabber = 1
  58.         if o == '-a':
  59.             continuous = 1
  60.         if o == '-m':
  61.             if ifilm.format <> 'grey':
  62.                 print '-m only supported for greyscale'
  63.                 sys.exit(1)
  64.             tomono = 1
  65.             treshold = string.atoi(a)
  66.             ofilm.format = 'mono'
  67.         if o == '-d':
  68.             if ifilm.format <> 'grey':
  69.                 print '-m only supported for greyscale'
  70.                 sys.exit(1)
  71.             tomonodither = 1
  72.             ofilm.format = 'mono'
  73.             
  74.     ofilm.writeheader()
  75.     #
  76.     prefsize(ifilm.width, ifilm.height)
  77.     w = winopen(ifile)
  78.     qdevice(KEYBD)
  79.     qdevice(ESCKEY)
  80.     qdevice(WINQUIT)
  81.     qdevice(WINSHUT)
  82.     print 'qdevice calls done'
  83.     #
  84.     help()
  85.     #
  86.     time, data, cdata = ifilm.getnextframe()
  87.     ifilm.showframe(data, cdata)
  88.     iframe = 1
  89.     report(time, iframe)
  90.     #
  91.     while 1:
  92.         if continuous:
  93.             dev = KEYBD
  94.         else:
  95.             dev, val = qread()
  96.         if dev in (ESCKEY, WINQUIT, WINSHUT):
  97.             break
  98.         if dev == REDRAW:
  99.             reshapeviewport()
  100.         elif dev == KEYBD:
  101.             if continuous:
  102.                 c = '0'
  103.             else:
  104.                 c = chr(val)
  105.             #XXX Debug
  106.             if c == 'R':
  107.                 c3i(255,0,0)
  108.                 clear()
  109.             if c == 'G':
  110.                 c3i(0,255,0)
  111.                 clear()
  112.             if c == 'B':
  113.                 c3i(0,0,255)
  114.                 clear()
  115.             if c == 'w' or continuous:
  116.                 if use_grabber:
  117.                     try:
  118.                         data, cdata = ofilm.grabframe()
  119.                     except VFile.Error, msg:
  120.                         print msg
  121.                         break
  122.                 if tomono:
  123.                     data = imageop.grey2mono(data, \
  124.                           ifilm.width, ifilm.height, \
  125.                           treshold)
  126.                 if tomonodither:
  127.                     data = imageop.dither2mono(data, \
  128.                           ifilm.width, ifilm.height)
  129.                 ofilm.writeframe(time, data, cdata)
  130.                 print 'Frame', iframe, 'written.'
  131.             if c == 'n' or continuous:
  132.                 try:
  133.                     time,data,cdata = ifilm.getnextframe()
  134.                     ifilm.showframe(data, cdata)
  135.                     iframe = iframe+1
  136.                     report(time, iframe)
  137.                 except EOFError:
  138.                     print 'EOF'
  139.                     if continuous:
  140.                         break
  141.                     ringbell()
  142.         elif dev == INPUTCHANGE:
  143.             pass
  144.         else:
  145.             print '(dev, val) =', (dev, val)
  146.     ofilm.close()
  147.  
  148. main()
  149.